Suppose Electrical Power P Is Given By $P = \frac { E ^ { 2 } } { R } \text {, where } E \text { is voltage and } R \text { is }$

Multiple Choice

Suppose electrical power P is given by $P = \frac { E ^ { 2 } } { R } \text {, where } E \text { is voltage and } R \text { is }$ resistance. Approximate the maximum percent error in calculating the power if 140 volts are applied to a 3000-ohm resistor and the possible percent errors in measuring E and R are 5% and 8%, Respectively.

A) 24%
B) 42%
C) 38%
D) 43%
E) 18%